"WPA Authentication/Association Failed" with RTL8192CU

Hi. I've tried to install archlinux in an old machine but I can't connect to internet by a Tp-link with RTL8192CU. After wifi-menu, I got

WPA Authentication/Association Failed

I've looked this problem in many topics but no one could help me.I ran wpa_supplicant -Dwext -i wlan0 -c /etc/supli.conf -B but I got the same error.Also, I've intalled in my machine (I'm ussing it to write this ) the last realtek driver but I have the same message.My supli.conf file is: